heroku/heroku — pull request #401 by hone (2012-06-23 09:00:26+00:00)
Title: Solves nil value for config var.

Fixes #400.

The Heroku API can return nil for a config var, like this:

{"COMMIT_HASH"=>nil}

This will cause the client to blow up. This sets the value to '', so the
client doesn't blow up.